If you're passionate about a subject and you have decent writing skills, blogging definitely could be an alternative career path for you. The short answer is, yes, it is possible to make a living—a very good one, even—by writing online. On the other hand, the hard truth is most of the millions of bloggers today don't make enough to support themselves just with their blogs. Let's take a look at what's involved.
If you want to work from home, blogging is the simplest and easiest way for you to do that.
And yes... you can do it. But to need to be enthusiastic, and commit to blogging, and keeping up with monetization methods.